Catch exceptions and errors in webdynpro

Hi,

I've some web applications, type BSP and Webdynpros in our portal. With the bsp exist a class "CL_HTTP_EXT_BSP" to catch the exceptions or the error and the we want save it in a log. With the table "bsperrhandler" you can add you own class. But i can't find any for webdynpros...

Is there a similiar class for web dynpros?

Thanks